School of Medicine


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  • Daniel Alves Neiva Barbosa

    Daniel Alves Neiva Barbosa

    Postdoctoral Research Fellow, Neurosurgery

    Bio Daniel A. N. Barbosa, M.D., is a Research Fellow working under the mentorship of Dr. Casey H. Halpern (Assistant Professor of Neurosurgery) and Dr. Jennifer McNab (Associate Professor of Radiology). He received his medical degree from the Federal University of the State of Rio de Janeiro in 2018. During his clinical education, Dr. Barbosa followed several renowned neurosurgeons and neurologists, and had a large experience with neurological and psychiatric patients. He developed great interest for the investigations of neurosurgical techniques to improve brain function. The invaluable experiences with these patients shaped a great interest on the investigations of neurosurgical techniques to improve brain function. His clinical and academic training together with the research experience provided him with an excellent background in multiple biological disciplines including neurosurgery, neurology, psychiatry, and neuroimaging. He also had the opportunity of joining a team of neurosurgeons and clinical scientists in the largest clinical study on deep brain stimulation for morbid obesity to date. With Drs. Ricardo de Oliveira-Souza, Alessandra Gorgulho, and Antônio De Salles (UCLA Emeritus Professor of Neurosurgery), Dr. Barbosa has led a systematic review on the topic. He also worked on the development and the publishing of this study protocol as well as that of a clinical trial of a novel neurosurgical therapy for depression. During his graduate career, these clinical investigations generated several peer-reviewed publications, book chapters, and conference presentations.

    Now, his investigation is contributing to the ongoing first-in-human early feasibility trial of closed-loop neuromodulation of the nucleus accumbens for Loss of Control Eating. He is also working on the design of innovative, invasive clinical studies for conditions like Obsessive Compulsive Disorder. He is committed to investigate cutting-edge neuroimaging and neurophysiology modalities, including diffusion magnetic resonance imaging, as well as novel brain-clearing techniques to improve stereotactic targeting neuromodulation for pathological impulsivity, a pervasive symptom in a wide range of neurological and neuropsychiatric disorders.

  • Mahendra Bhati

    Mahendra Bhati

    Clinical Professor, Psychiatry and Behavioral Sciences

    Bio Dr. Bhati is a board certified neuropsychiatrist with expertise in psychiatric diagnosis, psychopharmacology, and neuromodulation. He completed postdoctoral research studying transcranial magnetic stimulation (TMS) evoked potentials in schizophrenia and was a principle investigator for the DSM-5 academic field trials. His research experience included roles as an investigator in the first controlled clinical trials of deep brain stimulation and low field synchronized TMS for treatment of depression. His current interests include studying TMS-evoked potentials as biomarkers for neuropsychiatric disorders, augmented-reality TMS, closed-loop responsive neurostimulation for treatment of impulse and fear-related disorders, and magnetic resonance guided focused ultrasound for treatment-resistant obsessive compulsive disorder and depression.

  • Nikolas Blevins, MD

    Nikolas Blevins, MD

    Larry and Sharon Malcolmson Professor in the School of Medicine and Professor, by courtesy, of Neurosurgery

    Current Research and Scholarly Interests Inner ear microendoscopy -- Developing techniques for minimally-invasive imaging of inner ear microanatomy and neural pysiology. Applications include improved cochlear implant development, inner ear regenerative techniques, inner ear surgery, and auditory physiology.

    Microsurgical robotics -- Developing scalable microsurgical instrumentation and robotic techniques for use in head and neck surgery.

    Surgical Simulation -- Immersive environment for temporal bone surgical simulation.

  • Daniel Bloodgood

    Daniel Bloodgood

    Postdoctoral Research Fellow, Neurosurgery

    Bio I am a postdoctoral fellow interested in using multiplexing molecular, electrophysiological, and microscopy techniques to
    dissect the function of brain circuits in health and disease

  • Helen Bronte-Stewart, MD, MS

    Helen Bronte-Stewart, MD, MS

    John E. Cahill Family Professor, Professor of Neurology and, by courtesy, of Neurosurgery

    Current Research and Scholarly Interests My research focus is human motor control and brain pathophysiology in movement disorders. Our overall goal is to understand the role of the basal ganglia electrical activity in the pathogenesis of movement disorders. We have developed novel computerized technology to measure fine, limb and postural movement. With these we are measuring local field potentials in basal ganglia nuclei in patients with Parkinson's disease and dystonian and correlating brain signalling with motor behavior.

  • Vivek P. Buch, MD

    Vivek P. Buch, MD

    Clinical Assistant Professor, Neurosurgery

    Bio Dr. Buch is a neurosurgeon with fellowship training in epilepsy, functional, and minimally invasive neurosurgery. He is a clinical assistant professor in the Department of Neurosurgery of Stanford University School of Medicine.

    Dr. Buch focuses his expertise on the open and minimally invasive treatment of epilepsy, brain disorders, spinal injury and disease, and other conditions. For each patient, he develops a personalized care plan that is designed to be both comprehensive and compassionate.

    Dr. Buch has conducted extensive research. His interests include restorative network engineering for learning, intellectual, and cognitive disability and delivery mechanisms for gene, stem cell, and molecular therapies. He also is exploring technological innovations such as the use of holographic mixed reality and artificial intelligence for visualization and guidance in minimally invasive cranial and spinal surgery.

    He has co-authored articles on his research discoveries in the Annals of Surgery, Frontiers in Neuroscience, Epilepsia, Stereotactic and Functional Neurosurgery, Surgical Innovation, Journal of Neurosurgery, and many other journals. Articles focus on developing novel network control theory applications to human brain functions and new techniques and technologies to enhance neurosurgical effectiveness and patient outcomes.

    He is a contributor to the journals Surgical Innovation and Brain Sciences. He also has co-authored chapters in the books Neurosurgical Atlas, Operative Techniques in Epilepsy Surgery, Deep Brain Stimulation, and The Encyclopedia of Medical Robotics.

    Dr. Buch has presented the findings of his research at the national conferences of numerous professional associations. Among them are the American Association of Neurological Surgeons, Society for Neuroscience, Congress of Neurological Surgeons, and Society for Imaging Informatics in Medicine. Topics include understanding network mechanisms of cognitive control and advances in the use of augmented reality technology to enhance neurosurgical approaches.

    For his clinical, research, and academic achievements. Dr. Buch has earned many honors. He has won awards from the American Association of Neurological Surgeons, American Roentgen Ray Society, Congress of Neurological Surgeons, and National Institutes of Health.

    Dr. Buch is a member of the American Association of Neurological Surgeons, Congress of Neurological Surgeons, World Society for Stereotactic and Functional Neurosurgery, American Association of Stereotactic and Functional Neurosurgery, and Alpha Omega Alpha Medical Honor Society.

    He holds patents on artificial intelligence systems designed to help guide surgery and on neural control signals for behavioral modification therapy.

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